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    • 3. 发明授权
    • Aqueous dispersions of polyamides
    • 聚酰胺的水分散体
    • US5770680A
    • 1998-06-23
    • US738402
    • 1996-10-25
    • Stephen A. FischerDavid I. DevoreKartar S. AroraReimar Heucher
    • Stephen A. FischerDavid I. DevoreKartar S. AroraReimar Heucher
    • C08J3/07C09J177/00C08G69/08C08G47/08C08G73/10
    • C08J3/07C09J177/00C08J2377/00
    • A process is provided for preparing a dispersion of a polyamide in water, said process comprising: dissolving a polyamide having an amine value of greater than about 2 in an organic solvent to form a solution of said polyamide in said solvent, said polyamide and said solvent being at a temperature below the softening point of, said polyamide during said dissolving, said solution further comprising a surfactant and an inorganic alkaline material, adding sufficient water containing an acid to said solution with mixing to form an oil-in-water dispersion, the temperature of said solution and said water being below the softening point of said polyamide during said adding, the amount of said acid being sufficient to neutralize a portion of said inorganic alkaline material, but insufficient to coagulate said polyamide from the resulting oil-in-water dispersion, and removing at least a major amount of said organic solvent from said oil-in-water dispersion. The resulting dispersion is useful in preparing a coating of the polyamide, which coating is useful as an adhesive.
    • 提供了一种制备聚酰胺在水中的分散体的方法,所述方法包括:将具有大于约2的胺值的聚酰胺溶解在有机溶剂中以形成所述聚酰胺在所述溶剂中的溶液,所述聚酰胺和所述溶剂 在所述溶解期间处于低于所述聚酰胺的软化点的温度下,所述溶液还包含表面活性剂和无机碱性材料,在混合下向所述溶液中加入足够的含有酸的水以形成水包油分散体, 所述溶液的温度和所述水在所述添加期间低于所述聚酰胺的软化点,所述酸的量足以中和所述无机碱性物质的一部分,但不足以使所述聚酰胺从所得水包油中凝结 分散,并从所述水包油分散体中除去至少大量的所述有机溶剂。 得到的分散体可用于制备聚酰胺的涂层,该涂层可用作粘合剂。
    • 10. 发明授权
    • Hotmelt adhesive
    • 热熔胶
    • US5548027A
    • 1996-08-20
    • US307854
    • 1994-10-13
    • Reimar HeucherJuergen WichelhausKurt SchuellerSiegfried KopanniaAngela Rossini
    • Reimar HeucherJuergen WichelhausKurt SchuellerSiegfried KopanniaAngela Rossini
    • C08L77/00C08L77/08C09J123/08C09J125/00C09J125/10C09J131/04C09J177/00C09J177/08
    • C09J177/08C08L77/08
    • A hotmelt adhesive based on a number of components is provided. One of the components is at least one polyamide based on dimerized fatty acid, said polyamide being present in an amount by weight of the composition of at least 50%. Another component is from at least one ethylene copolymer selected from the group consisting of ethylene/vinyl acetate, ethylene/acrylate, said acrylate being derived from an alcohol containing 1 to 18 carbon atoms, and ethylene/methacrylate, said methacrylate being derived from an alcohol containing 1 to 18 carbon atoms, said ethylene copolymer being present in an amount by weight of the composition of 5 to 20%. Another component is at least one copolymer of styrene with one or more members selected from the group consisting of ethylene, isoprene and butylene, said copolymer of styrene being present in an amount by weight of the composition of 2 to 10%. Another component is at least one plasticizer, said plasticizer being present in an amount by weight of the composition of 5 to 25% by weight. Optional components are 0 to 10% by weight of at least one tackifying resin from the group consisting of polycyclopentadiene, polyterpene, liquid hydrocarbon resin and 0 to 15% by weight of at least one copolymer of monomers selected from the group consisting of ethylene, propylene, butylene and maleic anhydride.
    • PCT No.PCT / EP93 / 00728 Sec。 371日期:1994年10月13日 102(e)日期1994年10月13日PCT 1993年3月25日PCT公布。 WO93 / 20166 PCT公开号 日期:1993年10月14日提供了基于多种成分的热熔粘合剂。 组分之一是至少一种基于二聚脂肪酸的聚酰胺,所述聚酰胺以组合物的重量计存在至少50%。 另一组分是选自乙烯/乙酸乙烯酯,乙烯/丙烯酸酯,所述丙烯酸酯衍生自含有1至18个碳原子的醇和乙烯/甲基丙烯酸酯的至少一种乙烯共聚物,所述甲基丙烯酸酯衍生自醇 含有1至18个碳原子,所述乙烯共聚物的存在量为组合物重量的5-20%。 另一组分是苯乙烯与一种或多种选自乙烯,异戊二烯和丁烯的成员的至少一种共聚物,所述苯乙烯共聚物的存在量为组合物重量的2-10%。 另一种成分是至少一种增塑剂,所述增塑剂的含量按组合物重量的5至25%(重量)存在。 任选的组分为至少一种由聚环戊二烯,多萜烯,液体烃树脂组成的组中的至少一种增粘树脂和0至15重量%的至少一种选自乙烯,丙烯 ,丁烯和马来酸酐。